I looked up reverse geocoding with openstreetmap and found a keyless api. Reverse geocoding is the process of turning a location as a latitude and longitude into a place name. This is handy for creating my daily post footer, I want to have a script that will take in a lat/lng pair and output the full location name and weather with a map link.

I can use the kindly provided nominatim reverse geocoding URI and a bit of python. I guess openstreetmap thinks I am in a weird parallel UK that is made up of states, that is easy to deal with thankfully.

base_url = "http://nominatim.openstreetmap.org/reverse?format=json&lat={}&lon={}&zoom=18&addressdetails=1"
uri = base_url.format(lat, lng)

fp = urllib.request.urlopen(uri)
response = fp.read()

location = json.loads(response.decode("utf8"))
fp.close()

city = location['address']['city']
country = location['address']['country']

if country == "UK" or country == "US":
    country = location['address']['state']

return {'country':country, 'city':city}

I end up with a single script for generating the location/weather block. The script will default my 'work' location or it will try and format a lat/lng out of any arguments passed in.

#!/usr/bin/env python3.5

import forecastio
import pprint
import urllib.request
import json 
import sys

api_key = "yer_key_here_bawbag"
lat = 57.168
lng = -2.1055

def forwardweather(lat, lng):
    forecast = forecastio.load_forecast(api_key, lat, lng)

    weather = forecast.daily().data[0]

    temperatureMax = int(weather.apparentTemperatureMax)
    temperatureMin = int(weather.apparentTemperatureMin)
    summary = weather.summary

    return {'temperature':temperatureMax, 'summary':summary}

def reversegeocode(lat, lng):
    base_url = "http://nominatim.openstreetmap.org/reverse?format=json&lat={}&lon={}&zoom=18&addressdetails=1"
    uri = base_url.format(lat, lng)

    fp = urllib.request.urlopen(uri)
    response = fp.read()

    location = json.loads(response.decode("utf8"))
    fp.close()

    city = location['address']['city']
    country = location['address']['country']

    if country == "UK" or country == "US":
        country = location['address']['state']

    return {'country':country, 'city':city}

if __name__ == "__main__":
    if len(sys.argv) == 2:
        loc = sys.argv[1].split(',') 
        if len(loc) != 2:
            exit()
        lat = float(loc[0])
        lng = float(loc[1])
    if len(sys.argv) == 3:
        lat = float(sys.argv[1])
        lng = float(sys.argv[2])

    print("Getting weather for: {}, {}\n\n".format(lat, lng))

    weather = forwardweather(lat, lng)
    location = reversegeocode(lat, lng)

    base_url = "http://www.openstreetmap.org/search?query={}%2C%20{}"
    uri = base_url.format(lat, lng)

    print("[{}, {}][0]: {}°C, {}".format(location['city'], location['country'], 
        weather['temperature'], weather['summary']))
    print("\n[0]: {}".format(uri))

Reading: Virtual Light

I am still playing with other fields to stick onto the daily post. So far I have been sticking on a reading field that can sort of track how I am progressing with books. I want to include a fuzzy location and the state of the weather around me, obviously I know where I am looking back it will be interesting to me having a record of where I was when I posted.

I have tried with outside , reality , being and a load of other vague terms, writing this out those all look ridiculous. Now I have tried just letting the info hang there instead, my current lat/long converted to a place name with a link to a map, followed by the weather.

Reading: Cibola Burn, Virtual Light

Union Terrace Gardens has some excellent pieces that were put up as part of a street art festival . Adding culture to the city is great, but there is something about 'santioned creativity' that really annoys me. I know the residents around here would be up in arms if someone did a giant mural overnight.

Reading: Cibola Burn, Virtual Light

Location: 57.1578,-2.2143

Weather: 2°C Partly cloudy starting in the evening.

I think the weather stuff I played with yesterday is going to be an input to a quantified self dashboard I have been toying with building for a long time.

I have wanted to put together a dash for years, but I have always struggled to find technologies that I want to work with. For a demo at work I have had to put together a simple dash, all it does is show interface throughput for two interfaces, but it has give a chance to play with the front end UI and backend webserving components that I want to use.

I am lurking in a coffee shop now, which is a great time to have a first whack at the idea.

It is Sunday, so that makes seven days of writing .

Reading: Cibola Burn, Virtual Light

Location: 57.1446, -2.1060

Weather: 6˚C Clear.

pic.twitter.com/ds38znWfqF

— Warren Ellis (@warrenellis) December 1, 2016

My good friend Warren Ellis (well complete stranger, but I read his newsletter so that is pretty the same thing) tweets pictures of where he is with the weather info overlaid. I am sure he is using some sort of newfangled social media filter to provide the info. I want something similar for the footnotes on my fairly post, but social media stuff is no good for me, I need an API to use.

Now, as hard as I try I cannot find a weather service that will just spit some data at me. I really want to do curl weathersite.internet | jq... and end up with a nice summary for a location. The web is closing up and locking down, which means an API key is required.

After putting this off for a while, this morning I remembered I have previously registered for a weather service. A steaming cup of coffee later and I found the python bindings to the excellent forecast.io already installed.

import forecastio

api_key = "yer_key_here_bampot"
lat = 57.168
lng = -2.1055

forecast = forecastio.load_forecast(api_key, lat, lng)

weather = forecast.daily().data[0]

temperatureMax = int(weather.apparentTemperatureMax)
temperatureMin = int(weather.apparentTemperatureMin)
summary = weather.summary

print("{}°C {}".format(temperatureMax, summary))

Gives a nice

4°C Partly cloudy throughout the day.

There isn't anything to this, If I could find an API that didn't require a key I probably wouldn't even use python. But madness makes more madness, so here we are.

Reading: Cibola Burn, Virtual Light

Location: 57.168, -2.1055

Weather: 4°C Partly cloudy throughout the day.

Warren Ellis's morning.computer was the main driver for me to start blogging everyday. I like to think I am being influenced by someone super productive, rather than blantently copying him.